mai laddress rewrite

[Renee Klawitter]

Hi there!  I'm trying to rewrite my address when posting through nntp;
as you can see, without luck.  I've skimmed through the gnus help and
found:

(setq gnus-posting-styles
      '(("nntp:.*";
         (address "klawitter(at)email(dot)de"))))

But that obviously didn't do the trick. What did I miss ?
Many thanks in advance!
Renee.

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